Justt vs CertNode
Justt vs CertNode: An Honest Chargeback Defense Comparison
If you are researching Justt, you are probably losing money to chargebacks and want help fighting back. Justt is a well-funded, enterprise-grade chargeback automation platform, and for a lot of high-volume merchants it is a genuinely good fit. This page is not here to talk you out of it. It exists because Justt and CertNode Reflex solve the same problem from opposite ends of the market. Justt is built for mid-market and enterprise teams with disputes spread across many processors. CertNode Reflex is a Stripe App a solo founder or small shop can install in a few minutes, with pricing printed on the page and no sales call required. Here is a fair read on where each one fits, including the cases where Justt is clearly the better choice.
Who Justt is
Justt (justt.ai) is an AI-driven chargeback automation platform founded in 2020 and backed by roughly $100M in funding. It builds evidence-backed representments automatically using what it calls Dynamic Arguments, integrates with 30 to 50+ payment processors, and layers in pre-dispute alert networks like Ethoca and Verifi. It was named to the 2026 Forbes Fintech 50 and reports serving 250+ enterprise merchants alongside a large base of smaller businesses.
How their pricing works
Justt operates on a pure success-fee model. Per its own FAQ, you only pay when a chargeback is won, and it does not advertise a monthly or setup fee. The exact percentage is not published, so you would need to contact their team for a quote. As of 2026 the rate appears to be negotiated by volume and dispute mix rather than posted publicly, which is a common enterprise pattern. Treat any specific percentage you see quoted elsewhere as unverified until you confirm it with Justt directly.
Choose Justt if
- •You process disputes across several PSPs (Adyen, Braintree, PayPal, Stripe and more) and want one platform covering all of them, not just Stripe.
- •You are mid-market or enterprise with high monthly dispute volume and want a dedicated team plus custom onboarding.
- •You want pre-chargeback deflection through alert networks like Ethoca, Verifi, and RDR, which CertNode Reflex does not provide.
- •You prefer a negotiated enterprise contract and account management over self-serve, published pricing.
Choose CertNode Reflex if
- ✓You run on Stripe and want to install today, in a few minutes, with no sales call or contract.
- ✓You want pricing on the page: free to install, 15% of what is recovered ($25 minimum for new installs, capped at half the recovery), and $0 when a dispute is lost.
- ✓You are a solo founder or small shop whose volume is too low to interest an enterprise sales team.
- ✓You want evidence you can independently verify (ES256 signatures, RFC 3161 timestamps, Bitcoin anchoring, self-authenticating under FRE 902(13)/(14)) rather than a black-box submission.
The honest note
We cannot verify Justt's exact success-fee percentage because they do not publish it, so confirm any number directly with them. Justt is a capable, well-funded platform, and for high-volume merchants operating across multiple processors it may recover more in absolute dollars than a single-processor tool can. CertNode does not publish win-rate claims, and we will not pretend a young Stripe App matches an enterprise platform's scale or integration breadth. What CertNode Reflex offers is different: Stripe-native simplicity, pricing you can read without a call, no cost when you lose, and evidence anyone can verify. Pick the one that matches your size and stack, not the louder pitch.
On Stripe? Reflex is free to install and charges 15% only when it wins a dispute ($25 minimum on new installs, never more than half the recovery), $0 on losses.